The functional capability will be examined for both groups at several time points (baseline, the day before surgery, 1st, 2nd and 3rd day postoperatively, 4 weeks postoperatively and 8 weeks postoperatively) The primary end point is functional walking capacity as measured by the 6 minutes walking distance (6MWD) 4 weeks postoperatively. The secondary end points include lung function improvement (baseline vs. preoperative) ， self-reported physical activity, health-related quality of life scales and prognosis information (postoperative complications, length of hospital stay, ICU stay time, hospitalization expenses, etc.).